At 19 minutes, Hayley checks her phone which clearly says "Mon, Dec 21" at 20 minutes they point to the calendar on the wall for the day's activity and it says it's Saturday the 21st.
At the Christmas Tree Farm, there is a stand where they are roasting chestnuts. The sign says, $5/bag. Hayley goes to purchase and asks for two boxes.
Lead character mentions being in Cape Town and watching the sun rise over the Atlantic. The Atlantic is to the west, not from where the sun rises.